A Study on Saccadic Eye Movements at the Mutual Gazing

Eye movement is classified into the two types, one is saccadic eye movement and the other is smooth pursuit eye movement. We measured the corneo-retinal potential which is made on the eyeball, in order to investigate saccadic eye movement at the mutual gazing exactly. From the experiments, we verify that the latency and the velocity fluctuate with the direction of motion of eyeballs. And then it was found that the velocity of eye movement changes depending on the difference of eccentricity at the mutual gazing. Moreover we obtained the useful results by investigating experimentally the velocity difference between left eyeball and right eyeball in such following cases. When both eyeballs are opened, the velocity of the adduction is faster than the velocity of the abduction. When one eyeball is covered, the velocity of the covered eyeball is faster than the velocity of the opened eyeball.